Didn’t help that he showed up at his first couple Senate meetings gloating about winning the election. And tried to set working hours for his former colleagues. Among other things.
Obstructionism as a core tenet of the (former) Republican platform is reprehensible, and retrospectively probably led to quite a bit of discontent with the government’s inability to address problems that Americans face. That same discontent fomented the current reactionary swing, so in the end maybe they really got what they wanted. Shameful.
Right on. That's probably the worst part of the debilitating self-own we're currently going through. Even if conservatives (aka Democrats) gain back Congress, then gain back the Presidency, then overcome their controlled opposition dynamic where enough inevitably defect and undermine anything meaningful from getting done, so much has been broken that we will be lucky if they even manage to stop the hemorrhaging. Even if the Republicans that got "dragged into" the fascist fever start to have a bit of self-reflection to realize the damage they've done. We've got what, maybe 8 years until the malcontents' dog whistle refrains start to have credence again and then we're right back to staring down the destructionists - with a trail having already been blazed.
"Other things" most obviously being the racism caused in part by significant cognitive dissonance that uniquely affects white supremacists when having a black president.
They hated him for what he was.